MIMO SYSTEM BASED ON POWER SHARING USING SINGLE RF CHAIN

摘要

A single RF MIMO system based on power sharing according to an embodiment of the present invention may comprise: an antenna unit which includes a plurality of antennas each of which forms a radiation pattern having directionality; an admittance loading unit which provides a variable admittance value for control of a current flowing through each of the antennas in order to transmit a modem signal; a power amplifier which amplifies a signal output from a local oscillator and supplies power to the admittance loading unit; and a digital signal processing (DSP) unit which calculates the variable admittance value based on the modem signal. The single RF MIMO system based on power sharing according to the present invention is designed as a structure in which the integrated antennas form the respective radiation patterns having directionality and which enables various basis patterns to be formed through combination of currents flowing through several antennas, thereby enabling high-speed switching and admittance loading by which various currents can be precisely controlled. Accordingly, a conventional MIMO system can be improved, and thus system complexity is decreased and energy efficiency is improved, thereby providing an effect in which downsizing of a base station can be achieved.